Is the following grammatically correct? No matter how he kept tossing and turning, he could not fall asleep.
If grammatically correct, is it different in meaning to: No matter how he tossed and turned, he could not fall asleep.
Is the following grammatically correct? No matter how he kept tossing and turning, he could not fall asleep.
If grammatically correct, is it different in meaning to: No matter how he tossed and turned, he could not fall asleep.
Both are possibly grammatical - but do they make sense? "Tossing and turning" is not normally a strategy for achieving sleep - it is a more a symptom of sleeplessness.
However No matter how hard he tried he could not fall asleep would be both grammatical and logical.